Backscatter grids of South East Tasmania Shelf

Geoscience Australia carried out marine surveys in southeast Tasmania in 2008 and 2009 (GA0315) to map seabed bathymetry and characterise benthic environments through observation of habitats using underwater towed video. Data was acquired using the Tasmania Aquaculture and Fisheries Institute (TAFI) Research Vessel Challenger. Bathymetric mapping was undertaken in seven survey areas, including: Freycinet Pensinula (83 sq km, east coast and shelf); Tasman Peninsula (117 sq km, east coast and shelf); Port Arthur and adjacent open coast (17 sq km); The Friars (41 sq km, south of Bruny Island); lower Huon River estuary (39 sq km); D Entrecastreaux Channel (7 sq km, at Tinderbox north of Bruny Island), and; Maria Island (3 sq km, western side). Video characterisations of the seabed concentrated on areas of bedrock reef and adjacent seabed in all mapped areas, except for D Entrecastreaux Channel and Maria Island.

The datasets contains 7 backscatter grids of the south east Tasmania Shelf produced from the processed EM3002 backscatter data of the survey area using the CMST-GA MB Process.

澳大利亚地质调查局（Geoscience Australia）于2008年与2009年在塔斯马尼亚东南部开展了编号为GA0315的海洋调查，旨在通过水下拖曳视频观测栖息地，完成海床水深测绘并表征底栖环境特征。本次数据采集工作依托塔斯马尼亚水产与渔业研究所（Tasmania Aquaculture and Fisheries Institute, TAFI）的“挑战者号”研究船完成。本次调查共在7个区域开展水深测绘，具体包括：菲欣纳半岛（83平方千米，覆盖东海岸及陆架区域）、塔斯曼半岛（117平方千米，覆盖东海岸及陆架区域）、亚瑟港及邻近开放海岸（17平方千米）、修士群岛（41平方千米，位于布鲁尼岛以南）、霍恩河下游河口（39平方千米）、德恩特雷卡斯托海峡（7平方千米，地处布鲁尼岛以北的廷德博克区域），以及玛丽亚岛（3平方千米，覆盖岛屿西侧区域）。除德恩特雷卡斯托海峡与玛丽亚岛外，所有测绘区域的海床视频表征工作均聚焦于基岩礁及其毗邻海床区域。本数据集包含7幅塔斯马尼亚东南部陆架区的反向散射栅格数据，该系列数据通过CMST-GA MB Process软件，对调查区域经预处理的EM3002型反向散射数据进行处理后生成。